Rotary engine.



no; 7:0,261! Patented Sept. 30, I902. w. F. EVANS. ROTARY ENGINE.

(Application med July 8, 1902.

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WILLIAM FENNELL EVANS, OF CHICAGO, ILLINOIS.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 71 0,261, dated September so, 1902.

Application filed July 8,1902. Serial No. 114,769. (No model.)

To all whom, it may concern.-

Be it known that I, -WILLIAM FENNELL EVANS, a citizen of theUnited States, and a resident of Ohicago, in the county of Cook and State of Illinois, have invented a new and Improved Rotary Engine, of which thefollowing is a full, clear, and exact description.

The object of the invention is to provide a new and improved rotary engine which is simple and durable in construction, very effective in operation, easily reversible, and

arranged to utilize the motive agent to the fullestadvantage.

Ihe invention consists of novel features and parts and combinations of the same, as will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forminga part of this specification, in which similar characters of reference indicate corresponding partsin all the views.

Figure 1 is a side elevation of the improvement, part of the cylinder being shown in section. Fig. 2 is atransverse section of the same on the line 2 2 of Fig. 1, and Fig. 3 is a diagrammatic plan view showing the disposition of the blades between the spirals.

The cylinder A of the rotary engine is provided with suitable heads B and O, of which the head B is provided with a pipe I), connected with a boiler or other suitable source of motive-agent supply. The other head 0 is provided with an outlet E for the exhaust motive agent. i

In the heads B and C is journaledthe shaft F of a rotary piston provided with spirals G and G, secured on the shaft F and extend-. ing with their outer peripheral edges to the inner surface of the cylinder A, the spirals being spaced a suitable distance apart to accommodate rows of blades I-I, extending radially from the shaft F to the inner surface of.

the cylinder A. As illustrated in Fig. 1, the blades in one row break joints with those of the adjacent row, the blades in each row being spaced apart and spaced from the sides of the spirals G G, so as to leave sufficient openings between the blades in each row for the motive agent to pass through to the blades in the next row.

As shown in Figs. 1 and 3, the blades are preferably of flat metal, and the number of blades in a row may be varied according to the size of the engine and the distance the spirals G and G are spaced apart.

Now the motive agent passing into one end of the cylinder A by the inlet-pipe D passes between the spirals G and G, and thus acts with boiler-pressure on the blades H between the saidspirals to rotate the piston, it being understood that the steam acts successively on the rows of blades as the steam travels along between the spirals to finally pass out of the cylinder by the outlet-pipe E.

In order to permit of reversing the engine, it is only necessary to provide the head 0 with an inlet, such as D, and the head B with an outlet, such as E. The motive agent now passing into the cylinder at the head 0 causes a rotation of the piston in the reverse direction. It is understood that steam,compressed air, or water under pressure may be used as the motive agent. If water is used, the cylinder is preferably placed in an upright position.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A rotary engine comprising a cylinder having an inlet at one end and an outlet at the other end, a piston mounted to turn in the said cylinder, comprising a shaft extend- .ing centrally in the cylinder, spirals on the shaft extending to the inner surface of the cylinder, and blades on the shaft, between adjacent spirals and extending to the inner surface of the cylinder, as set forth.

2. A rotar en ine com risin a c linder- Y e p o I having an inlet at one end and an outlet at the other end, a piston mounted to turn in the said cylinder, comprising a shaft extending centrally in the cylinder, spirals on the shaft extending to the inner surface of the cylinder, and blades on the shaft, between adjacent spirals and extending to the inner surface of the cylinder, the said blades being arranged in longitudinal rows and the blades of adjacent rows breaking joints, as set forth.

3. A rotary engine comprising a cylinder having an inlet at one end and an outlet at the other end, a piston mounted to turn in the said cylinder and having a shaft extending centrally in the cylinder, spaced spirals on the shaft, extending to the inner surface of the cylinder, and blades extending radiname to this specification in the presence of ally on the shaft between adjacent spirals two subscribing witnesses. and reaching to the inner surface of the cyl- T 1 inder, the blades being arranged in longitudi- WILLIAM FEB NEIJL EVANS nal rows, the blades of adjacent rows break- Witnesses: ing joints, as set forth. JAMES A. FULLENWIDER,

In testimony whereof I have signed my MOSES A. LEVY. 

